Speed-changing gearing.



W. BARNES, J11.

SPEED CHANGING (BEARING.

APPLICATION FILED FEB. 21. 1911.

Patented Feb. 29, 1916.

2 SHEETS-SHEET I.

WITNESSES I A'TTORNEY w. BARNES, 1R.

. SPEED CHANGING GEARING.

APPLICATIION FILED FEB. 21.1911.

1, 173,639, Patented Feb. 29, 1916.

2 SHEETSSHEET 2.

UNITED STATES PATENT OFFICE.

W'ILFRE'D BARNES, JR, 0F WILKINSBURG, PENNSYLVANIA, ASSIGNOR TO WESTING-HOUSE ELECTBIC AND MANUFACTURING COMPANY, A CORPORATION OF PENN-SYLVANIA.

SPEED-CHANGING OEARING.

Application filed February 21, 1911. Serial No. 609,950.

To all whom it may concern:

Be it known that I, WILFRED BARNES, Jr., a citizen of the United States,and a resident of Wilkinsburg, in the county of Allegheny and State ofPennsylvania, have invented a new and useful Improvement inSpeed-Changing Gearing, of which the following is a specification.

My invention relates to speed-changing gearing, and it has for itsobject to provide an attachment that may be applied to electric or othermotors of standard construction without requiring alteration or-modification thereof, and that comprises speed-changing gearing bymeansof which a plurality of substantially constant speeds may be obtainedfrom the motors. I

nother object of the invention is to provide guards for the ends of theshafts of the speed changing mechanism which prevents accidentalengagement with users and external objects, and a still further objectis to provide means for extending any shaft of the mechanism beyond theguard therefor, so that an operative connection may be made thereto andthe shaft rotated in either direction.

Figure 1 of the accompanying drawing is an end view of a motor equippedwith speedchanging gearing constructed in accordance with my invention,and Fig. 2 is a plan and sectional view of the speed-changing gearingshown in Fig. 1, the sectional view being along the line 11-11 of Fig.1.

Secured by means of tap screws 1 to the top of an electric or.othersuitable motor 2, is a saddle or bracket 3 having two pairs ofprojecting alined sleeves 4-5 and 6-7 in which are mounted eccentricbearing members 9 and 10, respectively, for shafts 11 and 12. Upon oneend of the shaft 11 is a gear 14 that is adapted to mesh with a pinion15 upon the end of the motor shaft 16, and the respective hubs of thesaid gear and the said pinion are extended beyond the ends of the shaftson which they are mounted and are both internally and externallythreaded, the internal threads being of right-hand pitch while theexternal threads are of lefthand pitch, or vice versa.

Upon the end of the shaft 11, opposite the gear 14, is a pinion 18 thatis similar in construction to the pinion 15 and isv adapted to mesh witha gear 19, similar in construction to the gear 1t and similarly securedupon the end of the. shaft 12.

The sleeves 4 and 7 are circumferentially slotted, to provide guides forpins 20 and 21, respectively, that are threaded into the bearing members9 and 10 and constitute handles for rotating the same within theirsupportingsleeves so as to throw the gears carried by the several shaftsinto and out of mesh. The ins 20 and 21 are somewhat reduced in diameterat their threaded ends and the shoulders between the larger and smallerportions thereof are tapered, the sleeves 4 and 7 being correspondinglycounter-sunk at the ends of the circumferential slots therein to provideseats or recesses for the said shoulders. Thus, the gears carried by theseveral shafts may be locked info! out of mesh by turning the pins so asto cause the shoulders thereon to be seated in the said recesses.

The gears 14, 15, 18 and 19 are inclosed by gear casings 22 and 23 thatare respectively secured to the sleeves 5 and 6 and are provided withcovers 24 and 25 having cylindrical projections or sleeves 26 upon theirouter faces that surround the ends of the hubs of the gears and pinionsand extend parallel thereto a slight distance beyond their extremitiesto prevent accidental engagement of said ends with users and externalobjects.

An operative connection may be made to any one of the shafts 1'1, 12 and16 by means of a member 27 that is adapted to extend such shaft beyondthe guard sleeve 26 therefor. The member 27 comprises a relatively shortrod or shaft having anintermediate collar or shoulder 28 and a threadedend that is adapted to be screwed into the end of a gear or pinion hubas far as the collar or shoulder. A nut 29, having an internallyprojecting flange 30 upon its outer end is adapted to be screwed uponthe outer surface of the gear or pinion hub until the flange 30 engagesthe shoulder or collar 28 upon the extension member 27. Since thethreads upon the interior and exterior of the hubs are of oppositepitch, it is immaterial as to which direction the shafts are rotated, asthe extension member 27'wi11 be securely attached to the hub under allconditions.

Patented Feb. 29, 1916. V

I claim as my invention:

1. The combination with a shaft and gear member thereon, of a gearcasing having a guard sleeve for the hub of said gear member, and adetachable shaft extension that projects through and beyond the guardsleeve.

2. The combination with a shaft and a gear member thereon, of a gearcasing having a guard sleeve for the shaft end, and a detachable shaftextension that projects through and beyond the guard sleeve.

3. The combination with a shaft, and a gear mounted thereon the hub ofwhich extends beyond the end of the shaft and is externally andinternally threaded in opposite directions, of a shaft extension havingan intermediate collar and one end screwed into the said sleeve as faras the collar, and a nut screwed upon the sleeve and engaging the outerend faces of the collar on the shaft extension.

4. The combination with a shaft, and a gear mounted thereon the hub ofwhich extends beyond the end of the "shaft and is externally andinternally threaded, of a shaft extension having an intermediate collarand one end screwed into the said sleeve i as far as the collar, and anut screwed upon the sleeve and engaging the outer end faces WILFREDBARNES, JR.

Witnesses:

WM. E. LARREBEE, E. D. CHAPPELL.

